Lifting-jack.



w: FLEI'T. LIFTING JACK, APPLICATION FILED 'JULY 3, 1913.

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Patented Nov. 25, 1913.

2 SHEETS-SHEET l.

anoewtoz WlLuflm FLETT attomu W. .PLBTT. LIFTING JAOK. APPLICATION FILEDJULY 3,1913.

-wrtmam' ELI-T1; or-i rnn PARK,- nassacnvsn rrs.

LIFTING-JACK.

A ucaubn'mea J'uly a, 1,913. Serial No. 777,364.

Specification of Letters Patent.

Patented Nov. 25', 1913.

- State of Massachusetts, have invented certain new and usefulImprovements in Lifting-Jacks, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to new and useful improvements in lifting jacksand moreparvticularly to an automobile lifting jack, .the object of theinvention being to provide a lifting jack of the above character wherebyan automobile may be clamped therein and arranged upon one side so. thataccess to the under side of the machine may be'readilyhad.

Another object of the invention is the provlsion of a lifting ack ofthe. above character which will possess advantages in points ofefficiency and durability, is inexpensive of manufacture and at the sametime is simple in .construction and operation. I

\Vith the above and other objects in view,

this invention'consists in the novel features of constructionandthecombination and ar rangement of parts to be hereinafter more fullydescribed, pointed out in the claims and shown in the accompanyingdrawings,

in which- Figure l is a transverse sectional view of a lifting jackconstructed in accordance with my invention; Fig. 2 is a detailelevation 85 illustrating the relative positions of the lift- Fig. 3 isa top plan view; Fig. 4

ing jack;

' is a detail front elevation of one of the clamping blocks; Fig. 5 is adetail side elevation of the same, parts being broken away and insection; Fig. 6 is a sectional view illustrating the manner ofconnecting the side and end members. a Referring moreparticularly to thedrawings, 1 and 2 indicate the spaced track memhere upon which theautomobile or other vehicle is to run when the lifting jack is to beapplied thereto. The parallel tracks 1 and 2 are connected at their endsby means of the transverse members 3. These end members are in the formof a body plate having a longitudinal rib 4 formed on the under facethereof. The end members 3 are hingedly secured to the floor at one endby means of the plates 5, said plates being rig idly secured to thefloor and provlded with the spaced sleeves 6. said sleeves beingarranged uponopposite sides of the central -sleeve'7, which is formed atone'end of the end pieces 3. i

Slidably mounted upon the cross pieces 3 and arranged in opposedrelation are the ad uStable clamps 8, said clamps being provided with abase portion 9 which is secured to the cross pieces 3 by means of thebolt 10. The bolts 10 are movably arranged ,yvithin theelongated slots11 and are held in a clamping position by means of the nuts 12 which arethreaded upon the upper ends thereof, said nut's being readily loosenedwhen it is desired to adjust either one of the clamping members. Theclamping members 8 are provided at their upper. ends and upon the innerfaces thereof with the plate 13, at the central portions of which areformed the sockets 14. Arranged within the sockets 14 isthe cushioningmember 15 against which the hubof the vehicle'axle is disposed, saidcushioning member protecting the hub against wear or disfiguration whenigrranged between the two clamping memers.

Pivotally secured to the end of the ribs 4 opposite the hinge 6' 'arethe rack bars 16. Slidably mounted up'on the rack bars 16 are thebrackets 17 in the outer ends of which is mounted a shaft '18 andmounted upon each end of the shaft and engaging the rack 16 are thegears 19. Mounted upon one end of the shaft is the large gear 20, saidgear being adapted to mesh with the worm gear 21 which is suspended fromthe outer end of one of the members 3. Formed integral with the gear 21and projecting upwardly in a suitable bearing is a stem 22 having asubstantially rectangular centrally arranged bore 23 in which a crankhandle or other suitable operating member may be inserted to rotate theworm gear 21 and the shaft 18. This operation will rotate the gears 19to raise and lower the racks 16. said racks raising one side of theframe of the jack so that the automobile or other vehicle which ismounted upon the frame" will be tilted upon its side, as clearly illust-rated in Fig. 1.

In the ractical operation of my improved liftlng jack, the clampingmembers 8 are loosened and moved apart sufficiently I clamping membersare then iiiished inwardly untilthe-ends oft-he hub 'of the vehicles arearranged within the.;socl rets'1 1.- The clamp ing'members are thenrigidly secured in po sition and the shaft 18 rotated through the mediumof 'thecr'ank handle 24: tov raise the .frame of the jack at one sideand'tilt the vehicle. Itwill be readily understood that the plates 13which are secured tothe inner faces of. the clamping members 8 will bereadily a'djus'ted thereon at various heightsto accommodate the same tovarious sized vehicles.---. lt will be readily understood that"in-making the frame, the tracks .1 and 2 will-be. made of suiiicientlength to accommodate the largestsized vehicle and they "may be somounted upon the cross members 1 that .the cross members may be readilyadjusted toward or away fromeach other to accommodate-various lengths ofve- '20 moles. It will. also be apparent that my deviceisextremelysimple in construction and-can bemanufactured at a comparatively flowcost.

7 'While, I" have shown and described the preferred form of myinvention, it will be obvious that various. changes in the details ing aframe hingedly secured at one side thereof, opposedelam'ping membersadjustably mounted upon said frame, plates secured to the inner facesofthe clamping members for vertical adjustment, said plates beingprovided with socket members and means for tilting the frame to anydesired degree.

' 2. A device of the class-described includ-.

ing a frame hingedly secured at-one side thereof, clamping memberscarried by the frame and adapted for lateral adjustment, plates securedto the inner faces of said clamping members and. adapted for verticalrelative adjustment, said platesbeing provided with sock et members,andmeans for raising one side ofthe frame whereby the same will betilted at any desired angle 3; A device of the class described includinga frame, saidframe comprising longitudinal spaced bracket members,transverse members connecting the ends of the longitudinal bracketmembers, a-rib formed on the lower face of each of the transversemembers, said frame being hingedly secured at one side'thereof, saidtransversemembers having spaced slots arrangedupon opposite 'sides ofthe rib, clamping members having a base, bolts carriedib the base andremovably arranged in said slots whereby the clamping members may bereadily adjusted,

plates secured to the inner faces of the clamping members and providedwith sockets, and meansfor vraislng one sideof the frame to tilt thesame at any desired angle.

In testimony whereof I hereunto afiix my signature in t e presence oftwo witnesses.

. WILLIAM FLETT. Witnesses:

Amen M. Corner, JOHN' C. STEVENS.

